Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

BU3 Advancement > Bu advance CH3 > Flashcards

Bu advance CH3 Flashcards

1
Q
  1. What are required for all exposed vertical rebar? (Page 3-3)
A

rebar caps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q
  1. What is a temporary structure that supports its own weight and that of the freshly placed concrete as well as the live loads imposed upon it by materials, equipment, and personnel? (Page 3-4)
A

formwork

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q
  1. The majority of formwork involves concrete weighing how many pounds per cubic foot? (Page 3-5)
A

150

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q
  1. The recommended minimum construction live load to provide for the weight of crew members and equipment is how many pounds per square foot of horizontal projection? (Page 3-5)
A

50

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q
  1. Braces are used against wall forms to keep the forms in place and in alignment despite mishaps due to external forces, such as wind, personnel, equipment, vibration, and accidents which for most military applications this force is assumed to be how many times the wall height, in feet? (Page 3-12)
A

12.5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q
  1. What is used to shape and hold concrete? (Page 3-14)
A

sheathing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q
  1. What are usually used for leveling of the forms and making the forms easier to strip? (Page 3-14)
A

wedges

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q
  1. What are continuous timber placed on the ground that distributes a load and provides a level surface for scaffolding and shoring? (Page 3-14)
A

mudsills

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q
  1. What refers to concrete containing steel (bars, rods, strands, wire, and mesh) as reinforcement and designed to absorb tensile and shearing stresses? (Page 3-22)
A

reinforced concrete

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q
  1. What is the best material for reinforcing concrete? (Page 3-22)
A

steel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q
  1. How many standard sizes of reinforcing bars are in use today? (Page 3-23)
A

11

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q
  1. How many numbers are used to designate the style of wire mesh? (Page 3-27)
A

four

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q
  1. Fabric made of wire heavier than what should always be furnished in flat sheets? (Page 3-27)
A

w4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q
  1. What is a slender, vertical member that carries a superimposed load? (Page 3-28)
A

column

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q
  1. A pier or pedestal is a compressive member that is short (with height usually less than how many times the least lateral dimension) in relation to its cross-sectional area and carries no bending stress? (Page 3-28)
A

three

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q
  1. What are the principal load-carrying horizontal members that take the load directly from the floor and carry it to the columns? (Page 3-29)
A

beams

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q
  1. Horizontal steel is tied to vertical steel at least how many times in any bar length? (Page 3-29)
A

three

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q
  1. What are the basic ingredients used in the production of concrete? (Page 3-29)
A

Cement, water, and both fine and coarse aggregates

19
Q
  1. What concrete mix is used when great strength is required? (Page 3-31)
A

1:1:2

20
Q
  1. What concrete mix is used in large slabs and walls? (Page 3-31)
A

1:2:5

21
Q
  1. What concrete mix is used only in mass placing? (Page 3-31)
A

1:4:8

22
Q
  1. To achieve more control over the proportional quantities of cement, water, and aggregate for a concrete mix, you can use one of three methods: book, trial batch, or what else? (Page 3-31)
A

absolute volume

23
Q
  1. What is a theoretical procedure in which established data is used to determine mix proportions? (Page 3-32)
A

book method

24
Q
  1. The maximum size of aggregate should never exceed 1/5 of the narrowest dimension between side forms, 1/3 of the depth of slabs, or what amount of the distance between reinforcing bars? (Page 3-34)
A

3/4

25
Q
  1. What should be used in all concrete exposed to freezing and thawing, and, sometimes under mild exposure conditions, to improve workability? (Page 3-34)
A

entrained air

26
Q
  1. What means service where the concrete is exposed to deicing chemicals or other aggressive agents, or where it continually contacts moisture or free water before freezing? (Page 3-36)
A

severe exposure

27
Q
  1. What are sometimes used in concrete mixtures to improve certain qualities such as workability, strength, durability, water tightness, and wear resistance? (Page 3-37)
A

admixtures

28
Q
  1. What test measures the consistency of concrete? (Page 3-37)
A

slump test

29
Q
  1. What is the controlling factor of the compressive strength of concrete? (Page 3-38)
A

water-cement ratio

30
Q
  1. What property of concrete is its ability to resist a breaking force? (Page 3-39)
A

flexural strength

31
Q
  1. After how many days can the flexural strength of concrete be determined? (Page 3-40)
A

seven

32
Q
  1. What is the process of weighing or volumetrically measuring, and introducing into the mixer the ingredients for a batch of concrete? (Page 3-40)
A

batching

33
Q
  1. Specifications generally require that materials be measured in individual batches within the following percentages of accuracy: Cement: 1%, Aggregate 2%, water 1%, and what percent for air-entraining admixtures? (Page 3-41)
A

3%

34
Q
  1. Deliver and discharge concrete mixed in a transit mixer within 1.5 hours or before the drum has revolved how many times after the introduction of water to cement and aggregates or the cement to the aggregates? (Page 3-42)
A

300

35
Q
  1. Concrete that is kept agitated generally can be placed within what time frame after mixing? (Page 3-43)
A

1.5 hours

36
Q
  1. What are the most commonly used precast slabs or panels for floor and roof decks? (Page 3-45)
A

channel and double T

37
Q
  1. Channel slabs have been used in spans of up to how many feet? (Page 3-46)
A

50

38
Q
  1. Small closely spaced beams used in floor construction are usually called joists unless they are used in roof construction in which case they are called what? (Page 3-48)
A

purlins

39
Q
  1. Conventional concrete weighs approximately how many pounds per cubic foot? (Page 3-50)
A

150

40
Q
  1. How many pounds per cubic foot does lightweight concrete weigh depending on its intended use? (Page 3-50)
A

90-120

41
Q
  1. Insulating lightweight concrete has a unit weight ranging from 15 to 90 pounds per cubic foot, and its compressive strength seldom exceeds what psi? (Page 3-50)
A

1000

42
Q
  1. Heavyweight concrete is produced with special heavy aggregates and has a density of up to how many pounds per cubic foot? (Page 3-50)
A

400

43
Q
  1. What two general types are bond-breaking agents broken into? (Page 3-53)
A

sheet materials and liquids

BU3 Advancement (27 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions